Holographic technology is a technique of recording and reproducing the real three-dimensional image of an object by using the principle of interference and diffraction。
The first step is to use the interference principle to record the light wave information of the object，This is the shooting process: the object is irradiated by the laser to form a diffuse object beam;Another part of the laser beam is used as a reference beam on the holographic plate，The object beam superposition interferes，The phase and amplitude of each point on the light wave of an object is converted into a spatially varying intensity，The contrast and interval between the interference fringes can be used to record all the information of the light wave of the object。The plate recording the interference fringes becomes a hologram, or hologram, after the development, fixing and other processing procedures.
The second step is to use the diffraction principle to reproduce the light wave information of the object, which is the imaging process: the hologram is like a complex grating, under the coherent laser irradiation, the diffraction light wave of a linear record of sinusoidal hologram can generally give two images, namely the original image (also known as the initial image) and conjugate image。The reproduced image has strong three-dimensional sense and real visual effect。Each part of the hologram records the light information of each point on the object, so in principle each part of it can reproduce the entire image of the original object, and multiple different images can be recorded on the same negative through multiple exposures, and can be displayed separately without interference。 There are Tsinghua University, China Science and Technology, China Optoelectronic Research Institute, Zhejiang University, National University of Defense Technology, Shanghai Jiaotong University, Jiangsu University and so on。In addition to optical holography, infrared, microwave and ultrasonic holography technologies have also been developed, which are of great significance in military reconnaissance and surveillance。
Application/Holographic projection technology
The application of holographic projection technology in the stage art can not only produce three-dimensional air illusion, but also make the illusion interact with the performer to complete the performance together and produce a shocking performance effect。From the use of holographic projection technology in the Disel fashion runway show, the beautiful holographic projection picture accompanied by the model's steps took the audience to another world, as if the audience experienced a virtual and real dual world。When it comes to the use of holographic projection technology in the Dream Theater "Animation Master Norman", there is an extraordinary integration of stage art and film clips in the same space, showing the audience the latest innovations in multimedia art in the world。The service and sales industry is most in need of a mass base, and attracting consumers to the maximum extent is king。The application of holographic projection technology in this respect gathers people's eyes from a new perspective and arouses consumers' consumption desire。
The ultimate goal of the exhibition industry is how to sell products, and how to maximize the attention of the participants has become the magic weapon of this industry。Recently, the number of tiger image technology for the exhibition industry in real time launched a 360-degree phantom imaging system, the three-dimensional picture suspended in the real scene of mid-air imaging, creating a fantasy and real atmosphere, the effect is strange, full of science and technology。It has opened up a new marketing direction for the exhibition and display industry。
Hatsune Miku is the first virtual idol in the world to hold a concert using holographic projection technology。 On the evening of March 9, 2010, Sega held a Hatsune Miku hologram concert titled "Miku's Day"，The concert was a hit，All 2,500 tickets for the concert were snapped up in an instant，On the night of the concert, more than 30,000 loyal fans watched the entire concert via paid webcast。
Foreground/holographic projection technology
Holographic projection technology breaks through the traditional limitations of sound, light and electricity, and brings beautiful pictures to the audience, giving people a dual world feeling of virtual and real coexistence。The method of holography spread from optics to other fields。For example, microwave holography and acoustic holography have been greatly developed and successfully applied in industrial medical treatment。Holographic seismic wave, electron wave, X-ray and other aspects are also being deeply studied。Holograms have a wide range of applications。Such as used to study the shock wave of rocket flight, non-destructive testing of aircraft wing honeycomb structure, etc., the future holographic projection technology market development potential will be immeasurable。